Magnetization relaxation in YBCO films with improved supercurrent transport properties

L. Miu, I. Ivan, P. Badica, G. Jakob, D. Miu, P. Mele, K. Matsumoto, M. Mukaida, Y. Yoshida, T. Horide, A. Ichinose, S. Horii

    Research output: Contribution to journalArticlepeer-review

    3 Citations (Scopus)

    Abstract

    The relaxation of the irreversible magnetization in optimally doped YBCO films with natural and artificial pinning centres was measured in zero-field cooling conditions using SQUID magnetometry. The external magnetic field H was oriented along the c axis. An appropriate method for the determination of the characteristic vortex pinning energy from the normalized vortex-creep activation energy is discussed. This is based on the existence of a crossover elastic (collective) vortex creep at low temperatures T - plastic vortex creep at high T, caused by the T dependent macroscopic currents induced in the sample during magnetization measurements.

    Original languageEnglish
    Article number012026
    JournalJournal of Physics: Conference Series
    Volume234
    Issue numberPART 1
    DOIs
    Publication statusPublished - 2010

    All Science Journal Classification (ASJC) codes

    • Physics and Astronomy(all)

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